Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common stock	Treasury stock	Additional paid-in capital	Accum other comp (loss)	Accum deficit	Total
Balance at Dec. 31, 2017	$ 29	$ (12,148)	$ 375,611	$ (3)	$ (330,156)	$ 33,333
Balance, Shares at Dec. 31, 2017	2,910,334	(177,484)
Stock-based compensation			21			21
Restricted stock issued			71			71
Restricted stock issued, Shares	6,592
Common stock issued, net of shares withheld for employee taxes			200			200
Common stock issued, net of shares withheld for employee taxes, Shares	1,467
Unrealized gain (loss) on investments, net of tax				1		1
Unrealized gain (loss) on investments, net of tax				1		1
Net income (loss)					110	110
Balance at Jun. 30, 2018	$ 29	$ (12,148)	375,903	(2)	(330,046)	33,736
Balance, Shares at Jun. 30, 2018	2,918,393	(177,484)
Stock-based compensation			13			13
Common stock issued, net of shares withheld for employee taxes			46			46
Common stock issued, net of shares withheld for employee taxes, Shares	790
Unrealized gain (loss) on investments, net of tax				(2)		(2)
Unrealized gain (loss) on investments, net of tax				(2)		(2)
Net income (loss)					710	710
Balance at Sep. 30, 2018	$ 29	$ (12,148)	375,962	(4)	(329,336)	34,503
Balance, Shares at Sep. 30, 2018	2,919,183	(177,484)
Balance at Dec. 31, 2018	$ 29	$ (12,213)	375,979	(2)	(329,193)	34,600
Balance, Shares at Dec. 31, 2018	2,919,542	(185,941)
Stock-based compensation			20			20
Common stock issued, net of shares withheld for employee taxes			36			36
Common stock issued, net of shares withheld for employee taxes, Shares	6,415
Unrealized gain (loss) on investments, net of tax				3		3
Purchase of common stock, at cost		$ (501)				(501)
Purchase of treasury stock, at cost, Shares		(62,849)
Unrealized gain (loss) on investments, net of tax				3		3
Net income (loss)					(780)	(780)
Balance at Jun. 30, 2019	$ 29	$ (12,714)	376,035	1	(329,973)	33,378
Balance, Shares at Jun. 30, 2019	2,925,957	(248,790)
Stock-based compensation			8			8
Common stock issued, net of shares withheld for employee taxes			264			264
Common stock issued, net of shares withheld for employee taxes, Shares	29,296
Unrealized gain (loss) on investments, net of tax				(2)		(2)
Net income (loss)					(352)	(352)
Balance at Sep. 30, 2019	$ 29	$ (12,714)	$ 376,307	$ (1)	$ (330,325)	$ 33,296
Balance, Shares at Sep. 30, 2019	2,955,253	(248,790)